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[ 1/1 Equation]
    Work: Find the solution of equation （2500*12*0.9-70%*65*X*6.3%）/（30%*65*X*5%*65*X） = 3.8% .
    Question type: Equation
    Solution:Original question:

(

2500

×

12

×

9 10

−

70 100

×

65

X

×

63 1000

)

÷

(

30 100

×

65

X

×

5 100

×

65

X

)

=

19 500

Multiply both sides of the equation by:

(

30 100

×

65

X

×

5 100

×

65

X

)

(

2500

×

12

×

9 10

−

70 100

×

65

X

×

63 1000

)

=

19 500

(

30 100

×

65

X

×

5 100

×

65

X

)

    Remove a bracket on the left of the equation:：

2500

×

12

×

9 10

−

70 100

×

65

X

×

63 1000

=

19 500

(

30 100

×

65

X

×

5 100

×

65

X

)

    Remove a bracket on the right of the equation:：

2500

×

12

×

9 10

−

70 100

×

65

X

×

63 1000

=

19 500

×

30 100

×

65

X

×

5 100

×

65

X

    The equation is reduced to :

27000

−

5733 2000

X

=

9633 4000

X

X

    After the equation is converted into a general formula, there is a common factor:
    ( √9999X - √110850262 )
    From
        √9999X - √110850262 = 0
    it is concluded that:：

X1=	√110850262 √9999

    Solutions that cannot be obtained by factorization:
        X₂≈-106.480999 , keep 6 decimal places    
    There are 2 solution(s).

解程的详细方法请参阅：《方程的解法》

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